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-rw-r--r--src/shared/ptyfwd.c75
-rw-r--r--src/shared/ptyfwd.h2
2 files changed, 45 insertions, 32 deletions
diff --git a/src/shared/ptyfwd.c b/src/shared/ptyfwd.c
index 31274a1418..164c9b6ff3 100644
--- a/src/shared/ptyfwd.c
+++ b/src/shared/ptyfwd.c
@@ -42,6 +42,8 @@ struct PTYForward {
struct termios saved_stdin_attr;
struct termios saved_stdout_attr;
+ bool read_only:1;
+
bool saved_stdin:1;
bool saved_stdout:1;
@@ -298,7 +300,13 @@ static int on_sigwinch_event(sd_event_source *e, const struct signalfd_siginfo *
return 0;
}
-int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, PTYForward **ret) {
+int pty_forward_new(
+ sd_event *event,
+ int master,
+ bool ignore_vhangup,
+ bool read_only,
+ PTYForward **ret) {
+
_cleanup_(pty_forward_freep) PTYForward *f = NULL;
struct winsize ws;
int r;
@@ -307,6 +315,7 @@ int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, PTYForward
if (!f)
return -ENOMEM;
+ f->read_only = read_only;
f->ignore_vhangup = ignore_vhangup;
if (event)
@@ -317,13 +326,15 @@ int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, PTYForward
return r;
}
- r = fd_nonblock(STDIN_FILENO, true);
- if (r < 0)
- return r;
+ if (!read_only) {
+ r = fd_nonblock(STDIN_FILENO, true);
+ if (r < 0)
+ return r;
- r = fd_nonblock(STDOUT_FILENO, true);
- if (r < 0)
- return r;
+ r = fd_nonblock(STDOUT_FILENO, true);
+ if (r < 0)
+ return r;
+ }
r = fd_nonblock(master, true);
if (r < 0)
@@ -334,36 +345,34 @@ int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, PTYForward
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0)
(void)ioctl(master, TIOCSWINSZ, &ws);
- if (tcgetattr(STDIN_FILENO, &f->saved_stdin_attr) >= 0) {
- struct termios raw_stdin_attr;
-
- f->saved_stdin = true;
+ if (!read_only) {
+ if (tcgetattr(STDIN_FILENO, &f->saved_stdin_attr) >= 0) {
+ struct termios raw_stdin_attr;
- raw_stdin_attr = f->saved_stdin_attr;
- cfmakeraw(&raw_stdin_attr);
- raw_stdin_attr.c_oflag = f->saved_stdin_attr.c_oflag;
- tcsetattr(STDIN_FILENO, TCSANOW, &raw_stdin_attr);
- }
+ f->saved_stdin = true;
- if (tcgetattr(STDOUT_FILENO, &f->saved_stdout_attr) >= 0) {
- struct termios raw_stdout_attr;
+ raw_stdin_attr = f->saved_stdin_attr;
+ cfmakeraw(&raw_stdin_attr);
+ raw_stdin_attr.c_oflag = f->saved_stdin_attr.c_oflag;
+ tcsetattr(STDIN_FILENO, TCSANOW, &raw_stdin_attr);
+ }
- f->saved_stdout = true;
+ if (tcgetattr(STDOUT_FILENO, &f->saved_stdout_attr) >= 0) {
+ struct termios raw_stdout_attr;
- raw_stdout_attr = f->saved_stdout_attr;
- cfmakeraw(&raw_stdout_attr);
- raw_stdout_attr.c_iflag = f->saved_stdout_attr.c_iflag;
- raw_stdout_attr.c_lflag = f->saved_stdout_attr.c_lflag;
- tcsetattr(STDOUT_FILENO, TCSANOW, &raw_stdout_attr);
- }
+ f->saved_stdout = true;
- r = sd_event_add_io(f->event, &f->master_event_source, master, EPOLLIN|EPOLLOUT|EPOLLET, on_master_event, f);
- if (r < 0)
- return r;
+ raw_stdout_attr = f->saved_stdout_attr;
+ cfmakeraw(&raw_stdout_attr);
+ raw_stdout_attr.c_iflag = f->saved_stdout_attr.c_iflag;
+ raw_stdout_attr.c_lflag = f->saved_stdout_attr.c_lflag;
+ tcsetattr(STDOUT_FILENO, TCSANOW, &raw_stdout_attr);
+ }
- r = sd_event_add_io(f->event, &f->stdin_event_source, STDIN_FILENO, EPOLLIN|EPOLLET, on_stdin_event, f);
- if (r < 0 && r != -EPERM)
- return r;
+ r = sd_event_add_io(f->event, &f->stdin_event_source, STDIN_FILENO, EPOLLIN|EPOLLET, on_stdin_event, f);
+ if (r < 0 && r != -EPERM)
+ return r;
+ }
r = sd_event_add_io(f->event, &f->stdout_event_source, STDOUT_FILENO, EPOLLOUT|EPOLLET, on_stdout_event, f);
if (r == -EPERM)
@@ -372,6 +381,10 @@ int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, PTYForward
else if (r < 0)
return r;
+ r = sd_event_add_io(f->event, &f->master_event_source, master, EPOLLIN|EPOLLOUT|EPOLLET, on_master_event, f);
+ if (r < 0)
+ return r;
+
r = sd_event_add_signal(f->event, &f->sigwinch_event_source, SIGWINCH, on_sigwinch_event, f);
if (r < 0)
return r;
diff --git a/src/shared/ptyfwd.h b/src/shared/ptyfwd.h
index d3e229bd70..6208a543db 100644
--- a/src/shared/ptyfwd.h
+++ b/src/shared/ptyfwd.h
@@ -30,7 +30,7 @@
typedef struct PTYForward PTYForward;
-int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, PTYForward **f);
+int pty_forward_new(sd_event *event, int master, bool ignore_vhangup, bool read_only, PTYForward **f);
PTYForward *pty_forward_free(PTYForward *f);
int pty_forward_get_last_char(PTYForward *f, char *ch);